2014年初，江苏省举办了“未成年人文明礼仪”风采大赛，参加对象是全省中小学生，比赛形式为知识竞答、情景剧表演、微视频展示、辩论赛等。青少年参加该活动（）
①有利于掌握交往艺术，提高交往能力 ②有利于丰富学习生活，提高审美能力
③会分散学习精力，浪费宝贵的学习时间 ④有利于扩大交往范围，结识更多的朋友

美不胜收的“双勾函数” $y=x+\frac{1}{x}$是一个对称轴不在坐标轴上的双曲线，它的渐近线分别是y轴和直线y=x，其离心率e=(    )

假定英语课上老师要求同桌之间修改作文，请你修改你同桌写的以下作文，文中共有1０处语言错误，每句中最多有两处， 每处只涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（＾），并在其下面写出该加的词。

删除：把多余的词用（＼）划掉；

修改：在错的词下面划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均只限一词。

2）只允许修改10处，多者（从11处起）不计分。

    A foreign student graduated with honors from a finely university in Germany. He expected to find a good job and have a bright future. But in his disappointment, he wasn't even giving the chance for an interview! The third time he was refused, he phoned the company to ask how. "We don't employ dishonest people in Germany" is the answer. What was wrong? Shortly before he arrived in Germany, he found easy to steal subway rides. But he often rode without a ticket and was caught up three times. Now he had to pay a high price for his own behavior. We should all keep in minds: honesty is the best policy.